Blender FBX size

Unity Engine
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1

Hi guys,
I making game for Android in Unity3d and making models in Blender 2,63
I have little problem.My models in Blender exporting to FBX format but every models haves big size
My models street lamp"no texture" haves: FBX 241 kB the same model “no texture” in DEA 162 kB it is normal? for tis format?
afternoon i haves street lamp even owen FBX 3,7 MB !

Is set somewhere in blender higher compression ? Because 241 kB its for me very much
Thank for yours suggestion
Sorry my English lenguage

2

What’s the poly count on the model and how large is your texture?